/*This file is prepared for Doxygen automatic documentation generation.*/
/*! \file *********************************************************************
 *
 * \brief SPI Master driver for AVR UC3.
 *
 * This file defines a useful set of functions for the SPI interface on AVR UC3
 * devices.
 *
 * - Compiler:           IAR EWAVR32 and GNU GCC for AVR UC3
 * - Supported devices:  All AVR UC3 devices with an SPI module can be used.
 * - AppNote:
 *
 * \author               Atmel Corporation: http://www.atmel.com \n
 *                       Support and FAQ: http://support.atmel.no/
 *
 ******************************************************************************/

/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name of Atmel may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * 4. This software may only be redistributed and used in connection with an Atmel
 * AVR product.
 *
 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 *
 */

#include "spi_master.h"

#ifdef FREERTOS_USED

#include "FreeRTOS.h"
#include "semphr.h"

#endif


#ifdef FREERTOS_USED

//! The SPI mutex.
static xSemaphoreHandle xSPIMutex;

#endif


void spi_master_setup_device(volatile avr32_spi_t *spi, struct spi_device *device, 
     spi_flags_t flags, uint32_t baud_rate,
     board_spi_select_id_t sel_id)
{
  spi_set_chipselect_delay_bct(spi,device->id,CONFIG_SPI_MASTER_DELAY_BCT);
  spi_set_chipselect_delay_bs(spi,device->id,CONFIG_SPI_MASTER_DELAY_BS);
  spi_set_bits_per_transfer(spi,device->id,CONFIG_SPI_MASTER_BITS_PER_TRANSFER);
  spi_set_baudrate_register(spi,device->id,getBaudDiv(baud_rate, sysclk_get_pba_hz()));
  spi_enable_active_mode(spi,device->id);
  spi_set_mode(spi,device->id,flags);

#ifdef FREERTOS_USED
  if (!xSPIMutex)
  {
    // Create the SPI mutex.
    vSemaphoreCreateBinary(xSPIMutex);
    if (!xSPIMutex)
    {
      while(1);
    }
  }
#endif
}

status_code_t spi_read_packet(volatile avr32_spi_t *spi,uint8_t *data, size_t len)
{
  unsigned int timeout = SPI_TIMEOUT;
  uint8_t val;  
  size_t i=0;  
  while(len) {
  	 timeout = SPI_TIMEOUT;
     while (!spi_is_tx_ready(spi)) {
       if (!timeout--) {
         return ERR_TIMEOUT;
       }
     }
     spi_write_single(spi,CONFIG_SPI_MASTER_DUMMY);
     timeout = SPI_TIMEOUT;
     while (!spi_is_rx_ready(spi)) {
       if (!timeout--) {
         return ERR_TIMEOUT;
       }
     }
     spi_read_single(spi,&val);
     data[i] = val;
     i++;
     len--;
  }
  return STATUS_OK;
}

status_code_t spi_write_packet(volatile avr32_spi_t *spi, const uint8_t *data, size_t len)
{
  unsigned int timeout = SPI_TIMEOUT;
  size_t i=0;
  uint8_t val;
  while(len) {
     timeout = SPI_TIMEOUT;
     while (!spi_is_tx_ready(spi)) {
       if (!timeout--) {
         return ERR_TIMEOUT;
       }
     }
     val = data[i];     
     spi_write_single(spi,val);
     i++;
     len--;
  }
  return STATUS_OK;
}

//! @}